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Media bigwigs were gobsmacked Thursday night when CNN chief Jeff Zucker and the cable network’s veteran publicist Allison Gollust were seen in a heated exchange — in the middle of a party full of media power players.

At the Hollywood Reporter’s 35 Most Powerful People in NY Media party — where attendees at new Seagram Building eatery the Pool included Harvey Weinstein, Anna Wintour and others — Zucker and Gollust suddenly began speaking intensely and making anguished hand gestures before Gollust strode purposefully away into the crowd.

Sources told Page Six the kerfuffle wasn’t a fight between the pair but had to do with business that spilled over from the office. “It was something they were dealing with at CNN all day,” said a source, adding “it wasn’t an argument.” Gollust joined CNN in 2013 after leaving NBC, where she and Zucker had worked together for 15 years.

“It looked like she was reprimanding her husband or something,” laughed one baffled rival exec of the exchange.